Java 8 Practice Exam
Java 8, the version of Java programming language was released in March 2014, and is a major update to Java. Java 8 has many new features for performance, and maintainability which includes the Lambda expressions, the Stream API for functional-style programming, a new Date and Time API (java.time), default methods in interfaces, and the Optional class for handling null values. Java 8 changed Java development and made it more expressive, and efficient.
Certification in Java
8 validates your skills and knowledge in Java 8's advanced features,
of Lambdas, Streams, and the new Date/Time API, to write efficient and
maintainable Java applications.
Why is Java 8 certification important?
- The certification validates your expertise in Java 8 features.
- Enhances your career opportunities on advanced Java features.
- Increases your credibility in the software development.
- Boosts your employability for Java related roles.
- Sows your commitment to professional growth and learning in Java.
- Provides you a competitive edge in a job market.
Who should take the Java 8 Exam?
- Java Developer
- Software Engineer
- Backend Developer
- Full Stack Developer
- Web Developer (Java-based)
- Mobile Application Developer (Java-based)
- Java Architect
- Software Tester (focused on Java)
- DevOps Engineer (with Java background)
- Senior Java Developer
- System Engineer (Java expertise)
- Technical Lead (Java-focused teams)
- Java Application Support Engineer
- Java Integration Specialist
- Java Consultant
Skills Evaluated
Candidates taking the certification exam on the Java 8 is evaluated for the following skills:
- Lambda expressions and functional interfaces.
- Stream API .
- Optional class .
- New Date/Time API .
- Default methods in interfaces.
- Method references.
- Functional programming in Java.
- Collectors API to gather data in Streams.
- Java 8 features in multithreading and parallel streams.
Java 8 Certification Course Outline
The course outline for Java 8 certification is as below -
Domain 1 - Introduction to Java 8
- Overview of Java 8 Features
- Changes in Java 8 and Their Benefits
- Setting Up Java 8 Development Environment
Domain 2 - Lambda Expressions
- Syntax and Structure of Lambdas
- Using Functional Interfaces
- Lambda Scope and Closure
- Working with Lambda Expressions in Collections
Domain 3 - Stream API
- Understanding Streams in Java
- Stream Operations: Intermediate and Terminal
- Filtering, Mapping, and Reducing Data
- Collectors API for Collecting Results
- Parallel Streams for Performance Optimization
Domain 4 - Java 8 Date and Time API (java.time)
- Working with LocalDate, LocalTime, and LocalDateTime
- Manipulating Dates and Times
- Period and Duration Classes
- Formatting and Parsing Dates and Times
- Time Zone Handling with ZonedDateTime
Domain 5 - Default Methods in Interfaces
- Defining Default Methods
- Overriding Default Methods
- Multiple Inheritance of Interfaces
- The Use of Default Methods for Backward Compatibility
Domain 6 - Method References
- Types of Method References (Static, Instance, Constructor)
- Using Method References in Functional Interfaces
- Benefits of Method References for Code Readability
Domain 7 - Optional Class
- Using Optional to Avoid Null Pointer Exceptions
- Creating and Using Optionals
- Transforming and Filtering with Optional
- Optional vs Null and Best Practices
Domain 8 - Functional Interfaces
- Built-in Functional Interfaces (Predicate, Function, Consumer, Supplier)
- Creating Custom Functional Interfaces
- Using Functional Interfaces with Lambdas
Domain 9 - Collectors API
- Common Collectors (toList, toSet, joining, groupingBy, partitioningBy)
- Custom Collectors
- Collecting Data in Parallel
Domain 10 - Concurrency and Parallel Streams
- Using Parallel Streams for Performance
- Synchronization with Streams
- Best Practices for Concurrency with Streams